Re: Questions about indexes

On Wed, May 09, 2001 at 10:31:27AM +0200, Renaud Thonnart wrote:

> Does PostgreSQL create an index when a table is created?

 Yes, with PK.

> Does it create index even if there is no PK for this table?

 No.

> I know that indexes increase performance for SELECT but it is the
> contrary when INSERT because the index must be actualised every time,
> isn't it?

 Yes.

> How can I see all the index that PostgreSQL have implicitly create?

 You can, from psql, do:

     # \d table_name

 This order shows all info about a table, including existing indexes.

> How can I delete them in keeping integrity in the database?

 drop index?...

 Greets.

                 David